From a5d0fd9c8a21af4a524ae60470c9381e94af446a Mon Sep 17 00:00:00 2001
From: Alex Beregszaszi <alex@rtfs.hu>
Date: Sun, 5 Feb 2017 19:39:30 +0000
Subject: [PATCH] Do not create directories . and ..

---
 Changelog.md                  | 1 +
 solc/CommandLineInterface.cpp | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Changelog.md b/Changelog.md
index 038d944f6..0c4e83294 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -5,6 +5,7 @@ Features:
 
 Bugfixes:
  * Commandline interface: Always escape filenames (replace ``/``, ``:`` and ``.`` with ``_``).
+ * Commandline interface: Do not try creating paths ``.`` and ``..``.
  * Type system: Disallow arrays with negative length.
 
 ### 0.4.9 (2017-01-31)
diff --git a/solc/CommandLineInterface.cpp b/solc/CommandLineInterface.cpp
index 26355353a..6759727fe 100644
--- a/solc/CommandLineInterface.cpp
+++ b/solc/CommandLineInterface.cpp
@@ -461,7 +461,9 @@ void CommandLineInterface::createFile(string const& _fileName, string const& _da
 	namespace fs = boost::filesystem;
 	// create directory if not existent
 	fs::path p(m_args.at(g_argOutputDir).as<string>());
-	fs::create_directories(p);
+	// Do not try creating the directory if the first item is . or ..
+	if (p.filename() != "." && p.filename() != "..")
+		fs::create_directories(p);
 	string pathName = (p / _fileName).string();
 	ofstream outFile(pathName);
 	outFile << _data;